Question

Please help I don't Understand!

Answer 1

Answer: SAS similarity theorem

Proportional relationship:

`\sf (AB)/(AC) = (AM)/(AN)`

insert values

`\rightarrow \sf (21+9)/(14+6) = (21)/(14)`

simplify

`\rightarrow \sf 1 = 1`

L.H.S = R.H.S

The triangles are congruent and follows the rule SAS similarity theorem.

The triangles has/starts from the same angle, corner (A).